JPH0741140A - Conveyer apparatus - Google Patents

Abstract

PURPOSE:To dispense with resetting of a rate of work in process and improve the operability when similar operations are carried out in a plurality of operating stations by constitutionally resetting automatically a rate of work in process on the basis of data measured by an actual result measuring means. CONSTITUTION:In a conveyer apparatus for conveying automatically a conveyer for holding material in process such as a sewn workpiece to operating stations ST(ST1-ST11) in a sewing factory or the like, shaking mechanisms 1 are provided at an interval, and the operating stations ST are disposed around the respective shaking mechanism 1. Also, a pair of parallel bridge rails 10 are provided between the shaking mechanisms 1 and a plurality of station rails 11 are provided around the shaking mechanism 1. In operation, an actual result of operation per a fixed time of each operating station ST is measured and a ratio of work in process is reset on the basis of the data so as to indicate the conveyance for each operating station ST to a conveyance controlling means on the basis of the reset rate of work in process for regulating the operational balance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention conveys a carrier from a work station that has completed a work to a next work station in accordance with a transport sequence preset according to a unique carrier number assigned to the carrier. The present invention relates to a carrier device.

[0002]

2. Description of the Related Art Conventionally, in a garment factory or the like, various transfer devices have been proposed for automatically transferring a transfer material holding a work-in-process material such as a sewn product to a work station arranged along a transfer rail. ing.

In this type, the transport order is stored for each transport number of each transport body, the transport body number attached to the transport body is read, and the work is performed in accordance with the transport order corresponding to the transport body number. The carrier was carried from the finished work station to the next work station.

In general, the time required for the work at each work station is often different due to the difference in the work content of each work process for the workpiece. Therefore, when transporting multiple transporters on the same route, a work station with a short working time may have an idle time for work,
On the other hand, at a work station where the work time is long, the work efficiency is reduced because the workpieces are accumulated before the work.

As a means of compensating for these drawbacks, Japanese Patent Application No.
A technique as shown in No. 57578 has been proposed. According to this method, when there is a work station with a long working time, it is possible to set a support station for performing the same work as that work station in parallel in other work stations, and the carrier is It can be transported to a work station or a support station according to a preset transport ratio.

[0006]

However, in the case where the same work is performed in parallel as in the prior art, it is necessary to measure the work time at each work station in order to set an appropriate work-in-progress ratio. When the work time at the work station changes due to design changes or replacement of the worker himself, the work time must be measured and the work-in-progress ratio must be reset each time, which is very troublesome. There was a problem.

The present invention has been made in order to solve the above-mentioned problems, and automatically re-sets an appropriate work-in-progress ratio in response to fluctuations in work time at each work station to improve production efficiency. It is an object of the present invention to provide a transport device that can perform the above.

[0008]

In order to achieve the above-mentioned object, a conveying apparatus according to the invention of claim 1 comprises a track record measuring means for measuring a track record of each work station per fixed time, and the track record measuring means. Based on the measured data, the in-process ratio resetting means for resetting the in-process ratio, and the work control means for each work station based on the in-process ratio reset by the in-process ratio resetting means. And a work balance adjusting means for adjusting the work balance between the respective work stations performing the same work by instructing the conveyance to the work.

Further, in the carrying apparatus according to the second aspect, when the same work is performed at a plurality of work stations, the number of workpieces that have not been sewn is calculated for each work station based on the detection result of the reading means. The in-process ratio calculating means, the actual result measuring means for measuring the actual work results of each work station per fixed time, and the in-process ratio resetting the in-process ratio based on the data measured by the actual result measuring means. Instructing the transfer control means to transfer to each work station based on the setting means, the in-process ratio reset by the in-process ratio resetting means, and the numerical value calculated by the in-process number calculating means. Accordingly, the work balance adjusting means for adjusting the work balance between the respective work stations performing the same work is provided.

[0010]

In the transporting apparatus of the present invention having the above structure, when the same work is performed at a plurality of work stations, the performance measuring means measures the work performance of each work station per a fixed time, Based on the value, the in-process ratio resetting means resets the in-process ratio.

Then, the work balance adjusting means instructs the carrying control means to carry the work to the work station based on the work-in-progress ratio reset by the work-in-process ratio resetting means. Adjust work balance between work stations.

According to the second aspect of the present invention, when the same work is carried out at a plurality of work stations, the work-in-process number calculation means is based on the detection result of the reading means and is not yet sewn. The number of objects is calculated, and the actual result measuring means measures the actual work results of each work station for a certain period of time, and the in-process ratio resetting means resets the in-process ratio based on the value.

Then, the work balance adjusting means instructs the carrying control means to carry to the work station based on the work in progress ratio reset by the work in progress ratio resetting means and the number calculated by the work in progress number calculating means. By doing so, the work balance between the work stations performing the same field work is adjusted.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 2 to 4, the distribution mechanism 1 is installed in a sewing factory or the like at an interval, and each distribution mechanism 1 is provided with a column 3 standing upright on a floor surface 2. . The support shaft 4 is erected on the upper end of the support column 3 via a mounting base 5, and a support plate 6 is fixed to the upper end thereof.

The station rail support frame 7a is supported and fixed to the upper surface of the support plate 6 at an intermediate portion thereof. The pair of parallel bridge rail support frames 7b are supported and fixed by straddling between the support plates 6 of the adjacent distribution mechanisms 1.

On the other hand, a work station ST is arranged around the distribution mechanism 1.
The station rail support frame 7a extends from the bridge rail support frame 7b toward the. A part of the work station ST is arranged as a completion station STa for removing a work cloth or the like from a carrier 36 described later, and a loading station STb for mounting a new work cloth cut on the carrier 36. 2 is provided around the distribution mechanism 1 at the right end in FIG.

The other work stations ST are formed by a sewing device such as a sewing machine arranged below the station rail 11. For these work stations ST, ST1, ST2, ...
Each work station ST can be distinguished by the number attached next to it.

A pair of parallel bridge rails 10 suspended and supported by a plurality of suspension fittings 9 are provided between the distribution mechanisms 1 on the supporting frames 7a and 7b. Also,
Around the distribution mechanism 1, a plurality of horseshoe-shaped station rails 11 for the work station ST are provided, and the bridge rail 10 and the station rail 11 are provided.
The transport rail 8 is constituted by and.

At one end of the bridge rail 10 and one end of the station rail 11, the loading section 10 to the sorting mechanism 1 is provided.
a and 11a are formed at the other end of the bridge rail 10 and the other end of the station rail 11, respectively, and carry-out parts 10b and 11b from the distribution mechanism 1 are formed. Mechanism 1
At the same height position around the circumference of
It is arranged every other degree.

On the other hand, as shown in FIGS. 3 and 4, a rotating body 41 is rotatably supported by the support shaft 4 of the distributing mechanism 1. Then, the loading / unloading parts 10a, 11a, 1
A plurality of (eight in this embodiment) sorting arms 44 are radially projected and fixed at predetermined angles (in this embodiment, 45 degrees) so as to face 0b and 11b.

Further, on the support plate 6, a servo motor 47 for rotating the arm, which is capable of normal and reverse rotation, is mounted. Then, by rotating the servo motor 47 in the forward direction or the reverse direction, the rotating body 41 is rotated, and the sorting arm 44 holding the transport body 36 is rotated to a position facing the predetermined bridge rail 10 or the station rail 11. It is configured to be movable.

In addition, the endless first chain 20 is provided by a plurality of chain guides 22 provided on each hanging fitting 9,
It is stretched along the bridge rail 10. On the other hand, an endless second chain (not shown) is stretched along the station rail 11 by a plurality of chain guides (not shown) provided on each hanging fitting 9.

When the chain driving motor 26 mounted on the support plate 6 of the distribution mechanism 1 is rotated,
The first chain 20 is moved along the bridge rail 10 in the counterclockwise direction in FIG. 3 and is rotated by a rotation shaft (not shown).
The second chain is attached to the station rail 11
Around the same direction.

As a result, the carrier 36 on the bridge rail 10 or the station rail 11 is guided along the bridge rail 10 or the station rail 11 with the engagement ring 38 engaged with the first chain 20 or the second chain. And is transported in the direction of the arrow in FIG.

On the other hand, as shown in FIG. 4, the carrier 36 has a hanger shape so that an article such as a product to be sewn can be suspended. A roller (not shown) rolling on the rails 10 and 11 is rotatably supported, and a pair of engagement wheels having a plurality of engagement protrusions on the outer circumference in a state where a friction brake is always applied. 38 is rotatably supported. The carrier 36 has the bridge rail 10 with the engagement wheels 38 engaged with the first chain 20 or the second chain.
Alternatively, it is configured to be conveyed and moved along the station rail 11 in the arrow direction of FIG.

Further, as shown in FIG. 3, a number reading device 39 is attached to the hanging metal fitting 9 at the carrying-in portions 10a, 11a of the carrying-in bridge rail 10 and the station rail 11. Then, the carrier 36 is the bridge rail 10
Or the number reading device 39 along the station rail 11
When it is transported to the position corresponding to, the movement of the transport body 36 is temporarily stopped by contact with a stopper (not shown).

At this time, the engagement wheel 38 is rotated against the brake. In this state, the number reading device 39 is configured to read the number by a code mark (not shown) attached to the side surface of the engagement wheel 38 of the carrier 36 for identifying the carrier.

The details of the distribution mechanism 1 are described in JP-A-3.
-56323, and the details of the structure of the carrier 36, its moving mechanism, and number reading are described in JP-A-3-61211, so a detailed description thereof will be omitted.

Next, the electric system of this embodiment will be described with reference to the block diagram shown in FIG. The respective devices are driven and controlled by the electronic control circuit 60 to carry the carrier 36.
The electronic control circuit 60 includes a well-known CPU, ROM, RA
The M is configured as a main element of the logical operation circuit, and is provided with an input / output circuit for performing input / output with an external device.

The electronic control circuit 60 includes a number reading device 39.
Alternatively, a signal is input from various switch groups 70 such as a closing switch that is operated at the end of work to generate a closing signal.
On the other hand, based on these signals and the data in the ROM and RAM, it outputs a drive signal for driving the servo motor 47 and the like.

Further, one electronic control circuit 60 is provided for each distribution mechanism 1, and the plurality of electronic control circuits 60 are connected to the host computer 100 so that the host computer 100 can control the entire system. It is supposed to be done. In addition, this host computer 10
0 can input the detection result from the number reading device 39 via each electronic control circuit 60.

The host computer 100 determines which carrier 36 is which work station ST or bridge rail 1
The RAM 101 is provided with a storage area capable of detecting the position information indicating whether or not it is located at 0 and the number of work in progress for each work station ST, and storing the detection results of each carrier 36. Furthermore, each carrier 3
For RAM 6, the RAM 101 is provided with a storage area as a route counter n corresponding to the transport status and a bypass counter m for distinguishing bypasses that perform similar work.

The host computer 100 has a keyboard 111 for inputting data, a mouse 113, a display 115 for outputting data, and a printer 117.
Etc. are connected respectively. Then, it is possible to edit the transport path described later.

Further, inside the host computer 100, an RA for storing the edited transport path is stored.
M101 is provided. In the RAM 101, in addition to the transport path, a storage area for storing whether or not a support station performing the same work in parallel is set, and a storage area for storing which work station ST is the support station. There are areas, etc.

Next, the operation of the carrying device thus constructed will be described. The transport route editing process will be described with reference to the flowchart of FIG. 6 and the transport route of FIG. 7. It is assumed that the carrier 36, on which the workpiece to be sewn is mounted, is transported along the transport path having the route number “1” as shown in FIG. 7, and the workpiece to be sewn is sewn at each work station ST. The completed sewn product is taken out of the transport device at the completion station STa, the work station ST number is "a", and the route number "1" is the station number, as shown in FIG. → 4 → 5 → 6 → 2 →
a ". The work station ST to which the work is supported is called the main station, and its station number is the fourth "6" on the route. Further, the work station to be assisted is called a bypass, and its station number is "7, 8". Then, the editing process of the transport route corresponding to the route number “1” will be described, but the editing process for other route numbers will be omitted.

First, the operator inputs the number "3" of the first work station ST having the route number "1" (S1).
00 and S indicate steps. The same shall apply hereinafter), followed by RA
It is stored in M101 (S110). And RAM1
Each time the station number is stored in 01, it is checked whether the entered station number is "a", that is, whether the work station corresponding to the entered number is a completed station. By the determination, it is determined whether or not the input of the transport route is completed (S
120). When a number other than the number "a" of the completion station STa is input and stored (S120: NO), S
The processing of 100 to S120 is repeated. On the other hand, when the station numbers are sequentially input and the number "a" of the completed station STa is input and stored in the RAM 101, it is determined that the input of the transport route is completed (S120:
(YES), and shifts to the next processing.

Next, after the operator inputs an instruction of "ON / OFF" for bypass setting by using a key (not shown) on the keyboard 111 or the mouse 113, the instruction is stored in the RAM 101. (S125, S127). Then, it is determined whether or not bypass setting is performed (S130). Since the bypass setting is performed in the present embodiment, the instruction for the bypass setting is input and stored (S125, S127, S130: Y
ES). Next, the operator inputs the station number "7" of the work station ST, which is the protection station passing through as a bypass route, to the fourth work station ST on the transport route (S140). Furthermore,
The station number is stored in the RAM 101 so as to correspond to the first column of bypass, and the number of bypass settings is counted based on the number of times of storage during this storage processing (S160).

Then, the keyboard 111 or the mouse 113 is used to "end / continue" the bypass setting.
Any one of the instructions is input by the operator (S16
5). Since the setting has not been completed yet, the operator inputs an instruction to "continue" the bypass setting (S16).
5) Subsequently, it is determined that the bypass setting is not completed (S170: NO), and similarly, the station number “8”, which is the second support station, is input to the fourth work station ST6. Later, it is stored in the RAM 101 so as to correspond to the second column of bypass setting (S140, S160). The processes of S140, S160, and S165 are repeated until it is determined that the bypass setting is completed.

When there is an instruction to end the bypass setting (S170: YES), the bypass setting number is stored in the RAM 101.
(S180), and the transport route editing process ends. On the other hand, if the instruction to “do not perform bypass setting” is input (S130: NO), this processing is temporarily terminated without performing the processing of S140 and thereafter.

Hereinafter, the transport control of the transport body 36 based on the route number "1" in FIG. 7 after the transport route is edited in this way will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 8 is a transport control process that is executed when the number reading device 39 provided in the hanging fitting 9 reads the number of the transport body 36.

The fourth work station ST on the route
Two of ST7 and ST8 are set as bypass paths in 6 (bypass setting number 2), and it is stored in the RAM 101 that the number of work in process is 5 each.
Further, the work-in-progress ratio of these work stations is 1: 1: 1 as an initial value stored in the RAM 101.
The third work station ST5 at a rate of 13 in 0 minutes
Delivered from.

When the operator presses the start button, the first chain 20 and the second chain are rotated, and the carrier 36 can be carried, the carrier 36 is loaded by the worker from the loading station STb. To be done.

First, when the number reading device 39 provided in the charging station STb reads the number of the carrier 36,
Based on the number, the route counter n (= 0: initial value immediately after insertion) corresponding to the progress state of the transport route for the transport body 36 is searched from the RAM 101, the transport progress status is detected, and the route counter n Is incremented by 1, and the added route counter n (= 1) is stored in the RAM 101 (S200). The bypass counter m is reset to "0", and initial setting for identifying bypass is performed (S210).

Next, the RAM 10 for the transport route "1"
Based on the stored content of 1, it is determined that there is no bypass setting in the n (= 1) th work station ST3 of the transfer route (S220: NO), and the transfer body 36 is transferred to the first work station ST3 of the transfer route. In order to do this, the RAM 101 stores the work station number to which the carrier 36 is to be sent next, which corresponds to this path counter n (= 1).
And the conveyance instruction for controlling each sorting mechanism 1 is output to the electronic control unit 60 based on that (S23).
0). In other words, when the number reading device 39 of the carry-in section 10a of the bridge rail 10 reads the number of the carrier 36, and then the carrier 36 is held by the sorting arm 44, the carrier ST to which the carrier 36 should be transported next.
The servo motor 47 is rotationally controlled so that it is conveyed to the carry-out section 10b or 11b of the bridge rail 10 or the station rail 11. Thus, the transport control for the transport body 36 is once completed.

This carrier 36 is a work station ST3.
When the number reading device 39 provided on the bridge rail 10 reads the number, the second line and the third line next to this route have no bypass setting, and therefore the first line The same control is performed and the carrier 36 is carried to the work stations ST4 and ST5.

Even while such conveyance control is being carried out, the number of work in progress, the position of the conveyance body 36, and the route counter n of the other conveyance bodies 36 are interrupted by the number reading device at each place. Sequential RAM based on the detection result of 39
Stored in 101.

Further, the number of times the work end switch (not shown) is pressed for each work station is combined with the time to perform an interrupt process, and the work record value of the work station is stored in the RAM.
It is stored in 101.

The carrier 36 is the third work station S.
When the number is read after being transported from T5 to the bridge rail 10, the route counter n is set to "4", and then the bypass counter m is reset to "0" (S200, S210). As shown in FIG. 7, since there is a bypass setting at the route counter n (= 4) (S220: YES), the work-in-progress ratio is reset based on the work result value (S250). Now work station ST
It is assumed that the number of pressing of the end SW in the past 30 minutes of 6, ST7, and ST8 is 5, 5, and 3, respectively. The work-in-progress ratio of the work station ST6 is "1", the work-in-progress ratio of the work station ST7 is "1", and the work-in-progress ratio of the work station ST8 is "0.6".
Stored in 1.

Here, the in-process ratio before resetting is 1: 1:
Since it is 1, each work station ST6, ST7, ST8
The carrier 36 is transported so that the number of in-process items is equal. As a result, out of the 13 carriers 36 transported from ST5 in the past 30 minutes, ST6, ST7 are transported by 5 each, ST8 are transported by 3 at the present time (after 30 minutes).
The number of work-in-process at each work station is 5.

Next, the current in-process number (= 5) of the fourth main station of the route, that is, the work station ST6 is read from the RAM 101, and the in-process number (= 5) is in-process ratio (= 1). ), The calculation result (= 5) is taken as the numerical value x, and the number of the bypass, that is, the value “0” of the bypass counter m is the numerical value y.
Is stored in the RAM 101 as (S260). The work station ST corresponding to the bypass counter m (= 0) is the main station.

Subsequently, the bypass counter m is incremented (m = 1) (S270). Next, based on the bypass counter m (= 1), the current work-in-process number (= 5) of the work station ST7 is read from the RAM 101, and the current work-in-process number (= 5) and the work-in-progress ratio (= 5). 1) is read from the RAM 101, and further, S26
The same operation as 0 is performed and the operation result is "5",
Since the calculation result (= 5) is equal to the numerical value x (S28
0: YES), the numerical value x cannot be rewritten.

Then, the bypass counter m (= 1) becomes R
It is determined whether or not the number of bypass settings stored in the AM 101 (= 2) or more is determined (S300), and the bypass counter m (= 1) is smaller (S300: NO),
Bypass counter m is incremented (m = 2),
Based on the bypass counter m (= 2), the current work-in-process number (= 5) of the work station ST8 is read from the RAM 101, and the current work-in-process number (= 5) and work-in-process ratio (= 0.6). ) Is read from the RAM 101,
Further, the same operation as S260 is performed and the operation result is "8", and the operation result (= 8) is the numerical value x (= 5).
Since it is larger (S280: YES), the numerical value x and the numerical value y cannot be rewritten.

The bypass counter m (= 2) is the RAM 10
Since it is the bypass setting number (= 2) stored in 1 (S300: YES), the work station ST6 corresponding to the bypass y (= 0) of the route counter n (= 4).
In addition, a transfer instruction for transferring the transfer body 36 is issued by the electronic control unit 6.
It is output to 0 (S310).

In this way, the work station having the smallest numerical value x is determined, and since the work station has the lightest work balance, the carrier 36 is carried. In this case ST
Since 6 and ST7 have the same working capacity, they are preferentially transported to ST6 which is the main station.

When the calculation result is smaller than the numerical value x, the numerical value x is rewritten with the calculation result in S280 and
The numerical value y is rewritten to the value of the bypass counter m (S290).

Since the fifth and sixth work stations ST in the route shown in FIG. 7 are not set to bypass, the same processing as in the case of the first work station ST in the route described above is performed and the work station ST is conveyed. Body 36 is route 6
It is transported to the second completion station STa.

The host computer 100 constitutes a performance measuring means, and the processing step of S250 during the transfer control processing shown in FIG. 8 works as a work-in-progress ratio resetting means, and S260.
Execution of the processes of to S310 works as a balance adjusting means.

As described above, according to the carrying apparatus of this embodiment, the work balance can be automatically corrected when the balance between the bypasses is about to collapse. That is, even if a skilled worker at the work station ST7 is absent and a beginner works instead, the work in progress does not increase only at the work station ST7, and the work in progress at the work stations ST6, ST7, and ST8. The number is 30 in the past
According to the ratio obtained from the work results for one minute, the next transfer body 36 is transferred to the work station with the lightest work, which prevents the work in progress from being unnecessarily stagnated at the specific work station ST. Efficiency is improved.

Further, since an appropriate work-in-progress ratio can be automatically reset, it is possible to save the labor for the operator to input the value as in the conventional case.

The embodiments of the present invention have been described above.
The present invention is not limited to these examples, and it goes without saying that the present invention can be implemented in various modes without departing from the spirit of the present invention. For example, as described above, when the past processing result is measured, it is performed for 30 minutes, but this value may be set to an arbitrary time. In the present embodiment, the transporter 36 is the fourth work. Although the work-in-progress ratio is reset each time it is conveyed to the station, it may be controlled to set time and reset it periodically.

Further, it may be controlled so that the work-in-progress ratio is reset based on the work required time per unit number.

[0062]

As described above in detail, according to the carrying apparatus of the present invention, when the same work is performed at a plurality of work stations, the work-in-progress ratio is automatically calculated based on the data measured by the performance measuring means. Since it is automatically set again, even if the work time changes due to design changes or replacement of the worker himself, there is no need to re-measure the work time and reset the work-in-progress ratio each time, and operability is improved. improves.

Further, the work balance adjusting means adjusts the work balance among a plurality of work stations performing the same work based on the reset work-in-progress ratio, so that the work piece stays in a specific work station. The working time is shortened and the production efficiency is improved.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a basic configuration of the present invention.

FIG. 2 is an overall schematic layout diagram of a carrying device as an embodiment of the present invention.

FIG. 3 is a layout diagram illustrating the layout of a distribution mechanism, a transport rail, and the like of the transport device according to the present exemplary embodiment.

FIG. 4 is an enlarged partial front view of the carrying device according to the present embodiment.

FIG. 5 is a block diagram showing an electrical configuration of the present embodiment.

FIG. 6 is a flowchart showing a transport route editing process of this embodiment.

FIG. 7 is an explanatory diagram showing a route edit screen displayed on the display of the present embodiment.

FIG. 8 is a flowchart showing a transport control process of this embodiment.

[Explanation of symbols]

 ST work station 1 distribution mechanism 8 carrier rail 36 carrier 39 number reading device 60 electronic control circuit 100 host computer 101 RAM

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location D05B 21/00 7152-3B

Claims (2)

[Claims] 1. A transport mechanism which is provided with a plurality of work stations along a guide member for transporting a transport body on which a workpiece is mounted, and which is capable of transporting the transport body to each of the work stations according to a transport route for performing a work, A reading unit that is provided corresponding to each of the work stations and that reads a unique carrier code attached to the carrier, and the carrier mechanism by controlling the carrier in advance according to the carrier code. When a work station that has finished work is transported to the next work station according to the set transport route, and the same work is to be performed by multiple work stations, it is based on the preset work-in-process ratio between each work station. And measuring the work record of each work station per fixed time in a transfer device having a transfer control means for transferring the transfer body. Based on the data measured by the actual result measuring unit, the in-process ratio resetting unit for resetting the in-process ratio, and the in-process ratio reset by the in-process ratio resetting unit. Based on the above, the transfer control means is instructed to transfer to each work station to adjust the work balance between the work stations performing the same work, and the work balance adjusting means is provided. apparatus. 2. When performing the same work at a plurality of work stations, the number of work in progress calculation means for calculating the number of workpieces which have not been sewn yet for each work station based on the detection result of the reading means, A performance measuring means for measuring the work performance of each work station per constant time, a work in progress ratio resetting means for resetting the work in progress ratio based on the data measured by the performance measuring means, and the work in progress ratio Based on the in-process ratio reset by the resetting means and the numerical value calculated by the in-process number calculating means, the transfer control means is instructed to transfer to each work station to perform the same work. The work apparatus according to claim 1, further comprising a work balance adjusting unit that adjusts a work balance between the work stations.